Powertrain Architecture affects Driving Habits

Stoffels, Harald; Hohenboeken, Kay

doi:10.4271/2014-01-2869

Cited by 3 publications

(6 citation statements)

References 8 publications

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“…However, this can only be made accessible, when the overall powertrain installation supports fuel efficient driving habits in customer's hand. 4…”

Section: Fuel Economymentioning

confidence: 99%

“…from Stoffels, 5 Elm et al, 16 and Stoffels and Schroeer. 21 Moreover, the interaction of driveability, NVH, and customer driving habits was investigated on downsized powertrains equipped with manual transmissions Stoffels and Hohenboeken, 4 and an interaction between interior-noise characteristics and shift-habits for different engine architectures with same transient characteristics was revealed. With regard to fuel-efficient and driveable operation of an internal combustion engine, most relevant operational modes and their associated NVH attribute and source are listed in the following:…”

Section: Nvh Aspectsmentioning

confidence: 99%

“…engine speed and load) defined by the so called lugging-limit (lowest engine speed that can be operated at an acceptable level of NVH, governing parameter for the interaction of NVH, and fuel-efficient driving habits. 4 Dominating excitation sources: torsional vibrations, torque couples (inline 3-cylinder engine). 5,21 Frequency range is approximately 7-120 Hz.…”

Section: Nvh Aspectsmentioning

confidence: 99%

“…On top of this, progress in friction reduction countermeasures on the powertrain subsystems can reduce damping effects and in turn affecting the NVH characteristics. [1][2][3] However, there is a strong interaction between driveability, fuel economy, and noise, vibration and harshness (NVH) as it has been already shown in Stoffels and Hohenboeken, 4 i.e. a fuel-efficient powertrain could bear the risk that it cannot be operated fuel efficient as either their driveability or NVH characteristics are compromising an appropriate fuel-efficient operation.…”

Section: Introductionmentioning

confidence: 99%

“…a fuel-efficient powertrain could bear the risk that it cannot be operated fuel efficient as either their driveability or NVH characteristics are compromising an appropriate fuel-efficient operation. In Stoffels and Hohenboeken 4 it is revealed that the driving habits can be attributed to the number of cylinders of an ICE, in turn affecting the fuel consumption. It was found that the interior noise level, governed by the engine architecture, affects the gear-shift habit, which, in turn are influencing the fuel consumption.…”

Section: Introductionmentioning

confidence: 99%

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Balancing driveability, NVH, and fuel consumption on automotive powertrains using integrated simulation techniques

Stoffels

2017

Proceedings of the Institution of Mechanical Engineers, Part K:

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The engine downsizing approach can be considered as state-of-the-art automotive propulsion system. However, future trends are also indicating a trend to a further reduction of the number of engine architectures, normally accompanied with a reduction of the number of cylinders in internal combustion engines, including prospective use of alternative fuels such as compressed natural gas or the downsized engine embedded in a powertrain with electrically driven propulsion systems. Hitherto, different simulation approaches are employed to evaluate the trade-off between noise, vibration and harshness, driveability, and fuel consumption. This paper presents the coupling of two simulation tools, each one an established tool in its discipline, namely a 1D-gas-dynamics tool for a downsized internal combustion engine including a dedicated boost-pressure control approach, and a multibody dynamics tool to simulate the powertrain and vehicle dynamics, using the functional mock-up interface. Using this approach as an industry first application, a significant reduction of development time while avoiding duplication of powertrain subsystem modeling, is achieved. This enables a transient simulation and supports a fast analysis of different powertrain architectures. It, furthermore, allows a detailed look at the impact of powertrain subsystems like the architecture of the internal combustion engine, flywheel, and driveline design on relevant vehicle attributes. Moreover, the transient simulation approach allows the investigation of lag effects caused by the air-path characteristics of the internal combustion engine, or transient effects brought up with the advent of hybrid powertrain architectures. The application case of this tool chain presented in this paper revealed that engine architecture reduction should be carried out carefully in order to not compromise driveability of the engine later on. This could bear the risk of sacrificing fuel economy due to a higher lugging limit, often linked to a reduced firing order of the engine, caused by a reduction of the number of cylinders. The paper finally discusses prospective solutions in terms of conventional mechanical solutions and added electrified propulsion including potential limitations to overcome this issue.

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“…However, this can only be made accessible, when the overall powertrain installation supports fuel efficient driving habits in customer's hand. 4…”

Section: Fuel Economymentioning

confidence: 99%